Spectators try to stay ahead of a large cloud of dust after the implosion of the former Macy's department store building in downtown Houston on Sunday, Sept. 22, 2013.

Spectators try to stay ahead of a large cloud of dust after the implosion of the former Macy's department store building in downtown Houston on Sunday, Sept. 22, 2013.

Photo: Smiley N. Pool, Houston Chronicle

Spectators try to stay ahead of a large cloud of dust after the... Photo-5220255.70587 - Houston Chronicle

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Spectators head for their cars in a parking garage as a large cloud of dust rolls through downtown after the implosion of the former Macy's department store building in downtown Houston on Sunday, Sept. 22, 2013. less

Spectators head for their cars in a parking garage as a large cloud of dust rolls through downtown after the implosion of the former Macy's department store building in downtown Houston on Sunday, Sept. 22, ... more

Photo: Smiley N. Pool, Houston Chronicle

Spectators head for their cars in a parking garage as a large cloud... Photo-5220256.70587 - Houston Chronicle

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A Houston Police officer walks through streets covered with dust after the implosion of the landmark the former Macy's department store building in downtown Houston on Sunday, Sept. 22, 2013.

A Houston Police officer walks through streets covered with dust after the implosion of the landmark the former Macy's department store building in downtown Houston on Sunday, Sept. 22, 2013.

Workers tape the door seams on a building prior to the implosion of the Macy's building in downtown Houston on Sunday, Sept. 22, 2013.

Workers tape the door seams on a building prior to the implosion of the Macy's building in downtown Houston on Sunday, Sept. 22, 2013.

Photo: James Nielsen, Houston Chronicle

Workers tape the door seams on a building prior to the implosion of... Photo-5220279.70587 - Houston Chronicle

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Spectators lean out from a parking garage as they wait for the implosion of the landmark former Macy's department store building in downtown Houston on Sunday, Sept. 22, 2013.

Spectators lean out from a parking garage as they wait for the implosion of the landmark former Macy's department store building in downtown Houston on Sunday, Sept. 22, 2013.

Photo: Smiley N. Pool, Houston Chronicle

Spectators lean out from a parking garage as they wait for the... Photo-5220280.70587 - Houston Chronicle

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Police officers check the area in preparation for the implosion of the landmark former Macy's department store building in downtown Houston on Sunday, Sept. 22, 2013.

Police officers check the area in preparation for the implosion of the landmark former Macy's department store building in downtown Houston on Sunday, Sept. 22, 2013.

Photo: Smiley N. Pool, Houston Chronicle

Police officers check the area in preparation for the implosion of... Photo-5220281.70587 - Houston Chronicle

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Spectators are reflected in the windows of the 1300 Main building as they wait for the implosion of the landmark former Macy's department store building in downtown Houston on Sunday, Sept. 22, 2013.

Spectators are reflected in the windows of the 1300 Main building as they wait for the implosion of the landmark former Macy's department store building in downtown Houston on Sunday, Sept. 22, 2013.

Photo: Smiley N. Pool, Houston Chronicle

Spectators are reflected in the windows of the 1300 Main building... Photo-5220282.70587 - Houston Chronicle

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Workers prepare for the implosion of the former Macy's department store building in downtown Houston on Sunday, Sept. 22, 2013.

Workers prepare for the implosion of the former Macy's department store building in downtown Houston on Sunday, Sept. 22, 2013.

Photo: Byline, Credit

Workers prepare for the implosion of the former Macy's... Photo-5220283.70587 - Houston Chronicle

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Workers prepare for the implosion of the former Macy's department store building in downtown Houston on Saturday, Sept. 21, 2013. The building is set to come down just after sunrise on Sunday morning.

Workers prepare for the implosion of the former Macy's department store building in downtown Houston on Saturday, Sept. 21, 2013. The building is set to come down just after sunrise on Sunday morning.

Photo: Smiley N. Pool, Houston Chronicle

Workers prepare for the implosion of the former Macy's... Photo-5218327.70587 - Houston Chronicle

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Cables connect exterior walls in preparation for the implosion of the former Macy's department store building in downtown Houston on Saturday, Sept. 21, 2013. The building is set to come down just after sunrise on Sunday morning. less

Cables connect exterior walls in preparation for the implosion of the former Macy's department store building in downtown Houston on Saturday, Sept. 21, 2013. The building is set to come down just after sunrise ... more

The inscription reading "As we build our city let us think that we are building forever" is seen on the "The Water Screen" sculpture by Michael Davis that overlooks the fountain on Main Steet Square near the former Macy's department store building, left, in downtown Houston. less

The inscription reading "As we build our city let us think that we are building forever" is seen on the "The Water Screen" sculpture by Michael Davis that overlooks the fountain on Main Steet Square near the ... more

Crews pick up debris from demolishing the exterior of the downtown Macy's in preparation for the implosion next week on Thursday, Sept. 12, 2013, in Houston. ( Mayra Beltran / Houston Chronicle )

Crews pick up debris from demolishing the exterior of the downtown Macy's in preparation for the implosion next week on Thursday, Sept. 12, 2013, in Houston. ( Mayra Beltran / Houston Chronicle )

Photo: Mayra Beltran, Staff

Crews pick up debris from demolishing the exterior of the downtown... Photo-5203078.70587 - Houston Chronicle

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An unidentified worker picks up debris after they demolished the exterior of the downtown Macy's in preparation for the implosion next week on Thursday, Sept. 12, 2013, in Houston. ( Mayra Beltran / Houston Chronicle ) less

An unidentified worker picks up debris after they demolished the exterior of the downtown Macy's in preparation for the implosion next week on Thursday, Sept. 12, 2013, in Houston. ( Mayra Beltran / Houston ... more

Workers protect themselves from dust as they pick up debris after they demolished the exterior of the downtown Macy's in preparation for the implosion next week on Thursday, Sept. 12, 2013, in Houston. ( Mayra Beltran / Houston Chronicle ) less

Workers protect themselves from dust as they pick up debris after they demolished the exterior of the downtown Macy's in preparation for the implosion next week on Thursday, Sept. 12, 2013, in Houston. ( Mayra ... more

Work started earlier this year to strip and prepare the former department store for destruction, a task complicated by its proximity to buildings and light rail.

Work started earlier this year to strip and prepare the former department store for destruction, a task complicated by its proximity to buildings and light rail.

Photo: Mayra Beltran, Staff

Work started earlier this year to strip and prepare the former... Photo-5050566.70587 - Houston Chronicle

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Debris covers the sidewalk after the exterior of the downtown Macy's is demolished in preparation for the implosion next week on Thursday, Sept. 12, 2013, in Houston. ( Mayra Beltran / Houston Chronicle )

Debris covers the sidewalk after the exterior of the downtown Macy's is demolished in preparation for the implosion next week on Thursday, Sept. 12, 2013, in Houston. ( Mayra Beltran / Houston Chronicle )

Photo: Mayra Beltran, Staff

Debris covers the sidewalk after the exterior of the downtown... Photo-5203086.70587 - Houston Chronicle

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The downtown Macy's - and former Foley's - is scheduled for implosion at ten minutes after sunrise on Sunday, Sept. 22.

The downtown Macy's - and former Foley's - is scheduled for implosion at ten minutes after sunrise on Sunday, Sept. 22.